Issue
EPL
Volume 82, Number 4, May 2008
Article Number 47007
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/82/47007
Published online 13 May 2008
EPL, 82 (2008) 47007
DOI: 10.1209/0295-5075/82/47007

Resonance and Doppler-shifted electromagnetic modes in organic conductors

D. I. Stepanenko

B.Verkin Institute for Low Temperature Physics and Engineering, Ukrainian Academy of Sciences 47 Lenin ave, Kharkov, 61103, Ukraine

stepanenko@ilt.kharkov.ua

received 18 September 2007; accepted in final form 27 March 2008; published May 2008
published online 13 May 2008

Abstract
The electromagnetic modes in organic conductors with marked anisotropy Fermi surface in the form of the warping planes has been investigated theoretically in the presence of an external magnetic field H0. The specific feature of such electron energy spectrum is that the electron drift velocity is an oscillatory function of the angle of magnetic-field direction. For certain orientations of H0 there is no Landau absorption, and propagation of weakly damped collective modes is possible even under strong spatial dispersion. We have shown that the high-frequency collective modes which are analogues of cyclotron waves in metals with closed Fermi surface sections may occur in the considered conductors. The spectrum of these excitations in the neighborhood of the resonances has been obtained.

PACS
72.15.Nj - Collective modes (e.g., in one-dimensional conductors).
72.15.Gd - Galvanomagnetic and other magnetotransport effects.

© EPLA 2008